zcash ecosystem digest | june 27th submission

[DavidIfebueme]

summary

adds the june 27th zcash ecosystem digest under newsletter/.

coverage

• includes the requested digest sections: zcash updates, zcash community grants, community projects, meme of the week, video of the week, and jobs in the ecosystem.
• includes more than 20 zcash and privacy ecosystem/community links.
• uses stable public links from zcash foundation, github releases, youtube, and the zcash community forum.

validation

• checked 51 unique external urls from the draft; all resolved successfully.
• verified the committed branch diff adds only newsletter/digest 06-27-26.md.
• verified the committed file contains all expected sections and 51 markdown links.